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. 2021 Nov 11;12:772848. doi: 10.3389/fendo.2021.772848

Table 1.

Demographic characteristics of the study population.

Overall Good Sleepers (SQI ≤ 8) Bad Sleepers (SQI>8) p
N 258 129 (50.0%) 129 (50.0%)
Age 48.8 ± 7.6 48.1 ± 7.6 49.6 ± 7.6 0.10
Gender % (Male) 243 (94.2%) 122 (94.6%) 121 (93.8%) 0.79
Race %
-Caucasian 215 (83.4%) 105 (81.4%) 110 (85.3%) 0.59
- African American 37 (14.3%) 20 (15.5%) 17 (13.2%)
- Asian, Native Hawaiian or American Native 6 (2.3%) 4 (3.1%) 2 (1.5%)
Highest level of education completed* %
- Basic or intermediate education 130 (50.4%) 58 (45.0%) 72 (55.8%) 0.08
- Advanced education 128 (49.6%) 71 (55.0%) 57 (44.2%)
Current Marital Status
- Married 207 (80.3%) 102 (79.1%) 105 (81.4%) 0.84
- Divorced or widowed 37 (14.3%) 19 (14.7%) 18 (14.0%)
- Never Married 14 (5.4%) 8 (6.2%) 6 (4.6%)
Second job %
- No 111 (43.0%) 56 (43.4%) 55 (42.6%) 0.92
- Yes, 1 other job 119 (46.1%) 60 (46.5%) 59 (45.8%)
- Yes, more than one other job 28 (10.9%) 13 (10.1%) 15 (11.6%)
modified Mediterranean Diet Score (mMDS) 24.3 ± 6.2 24.8 ± 5.6 23.8 ± 6.7 0.20
Smoke (active) % 10 (3.9%) 5 (3.9%) 5 (3.9%) 0.99
Use smokeless tobacco
- Not at all 234 (91.1%) 119 (92.2%) 115 (89.8%) 0.07
- Not every day 8 (3.1%) 6 (4.7%) 2 (1.6%)
- Every day 15 (8.6%) 4 (3.1%) 11 (8.6%)
Alcohol beverages per week (beer, wine or spirits) 3 (3-5) 4 (2-5) 3 (3-5) 0.32
Physical Activity
- Not practice regularly recreation, sport, or vigorous physical activity 38 (14.7%) 16 (12.4%) 22 (17.1%) 0.16
- Practice regularly recreation or work requiring modest physical activity 61 (23.6%) 26 (20.2%) 35 (27.1%)
- Regular vigorous physical exercise 159 (61.6%) 87 (67.4%) 72 (55.8%)

*Basic or intermediate education included high school or equivalent, vocational/technical school and some college, and advanced education included associate degree, bachelor’s degree, master’s degree and doctoral degree.